according to an independent, nonpartisan study, barack obama and the liberals will raise taxes on the middle class by $4,000. >> reporter: now, after the debate, his key advisers, eymney's key advisers, said they thre surprised the president didn't put up more of a fight. one told me they were ready for some of these attacks on bain capital. romney's comment about the 47% of americans who don't pay federal income taxes. raose have featured prominently in the president's attack ads. last night, scott, he didn't mention either one. >> pelley: jan, thank you. ace president joe biden also talked about taxes today, and here's what he had to say at a llmpaign stop in iowa. >> on top of the trillion dollars of spending we've skready cut, we're going to ask, yes, we're going to ask the wealthy to pay more. my heart breaks. come on man. yo ( applause ) you know the phrase you always use? obama and biden want to raise taxes by $8 trillion. guess what? yes, we do, in one regard. we want to let that trillion- dollar tax cut expire so the middle class doesn't have to bear the burden of all that mo